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问题 多项选择题

关于截流，以下说法正确的是( )。

A．一般条件下，可考虑选用平堵截流、建闸等截流方法

B．截流流量大且落差大于3.5m时，宜选择双戗或多戗立堵截流

C．截流落差不超过3.5m时，宜选择单戗立堵截流

D．应充分分析水力学参数、施工条件和难度、抛投物数量和性质，并进行技术经济比较

E．截流过程包括戗堤的进占形成龙口、龙口范围的加固、合龙和闭气

答案

参考答案：B,C,D,E

改错题

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，要求你在错误的地方增加、删除或修改某个单词。

增加： 在缺词处加一个漏词符号（∧），并在其下面写上该加的词。

删除： 把多余的词用斜线（﹨）划掉。

修改： 在错的词下划一横线，并在该词下面写上修改后的词。

注意：1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11处起）不计分。

Yesterday evening Alice was busy prepare for her tomorrow’s test when suddenly loud noises came into her room. Her neighbor was watching football match on TV in his room. The noises were so loudly that she couldn’t go on studying. She covered her ear with her hands, try to keep the noises out, and it was no use. Alice got impatient. So she has to go to explain his difficulty. After hearing that she said, her neighbor apologized and turned down the TV immediately. Alice thanked to him and went back to continue her study.
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选择题

正在运动着的物体，如果它所受的一切外力同时消失，那么它将（　　）

A．立即停下来

B．先慢下来，然后再停下来

C．改变运动方向

D．沿原来的运动方向做匀速直线运动
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